208031493 has 8 divisors (see below), whose sum is σ = 277510048. Its totient is φ = 138620304.

The previous prime is 208031479. The next prime is 208031497. The reversal of 208031493 is 394130802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208031493 - 2¹⁸ = 207769349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208031493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208031497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9130 + ... + 22347.

It is an arithmetic number, because the mean of its divisors is an integer number (34688756).

Almost surely, 2^208031493 is an apocalyptic number.

It is an amenable number.

208031493 is a deficient number, since it is larger than the sum of its proper divisors (69478555).

208031493 is a wasteful number, since it uses less digits than its factorization.

208031493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33683.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 208031493 is about 14423.2968838612. The cubic root of 208031493 is about 592.5291153419.

The spelling of 208031493 in words is "two hundred eight million, thirty-one thousand, four hundred ninety-three".